Mk1 Inertia Starter

I've attached some pictures to help show where I'm at with this problem. I have the shaft nut (11), main spring (12), washer (unlabeled), and sleeve (9) removed from the armature shaft. What I can't figure out how to remove is the pinion and barrel assembly which has the restraining spring (16) and control nut (15) inside. The pinion and barrel moves freely on spring compression down to the stop on the armature shaft. With the spring relaxed it will move about 1/4" up the shaft to an internal stop. The manual shows a washer (14) and retaining ring (13) around the sleeve (9). This retaining ring must be what secures it in place but I can't see anything. I was expecting to find some kind of internal snap ring holding the assembly on the armature shaft.

I can't figure out how to remove the control nut from the pinion barrel on our starter. My manual simply says to remove it - but it sure seems to be engaged by 'ears' inside the barrel. It's probably something simple but I'm stumped!

I've attached some pictures to help show where I'm at with this problem. I have the shaft nut (11), main spring (12), washer (unlabeled), and sleeve (9) removed from the armature shaft. What I can't figure out how to remove is the pinion and barrel assembly which has the restraining spring (16) and control nut (15) inside. The pinion and barrel moves freely on spring compression down to the stop on the armature shaft. With the spring relaxed it will move about 1/4" up the shaft to an internal stop. The manual shows a washer (14) and retaining ring (13) around the sleeve (9). This retaining ring must be what secures it in place but I can't see anything. I was expecting to find some kind of internal snap ring holding the assembly on the armature shaft.